Mallory Ignition Mallory HYFIRE VII Series Electronic Ignition Controls 667C - Manual (Page 2)

GENERAL INFORMATION
The RPM limiter in the HYFIRE ® VIIC Ignition System is not recommended as
an engine speed governor. The use of the RPM limiters is not recommended
for applications equipped with a catalytic converter. Similarly, forcing engine
RPM past the RPM limiter continuously for long sustained intervals can cause
problems resulting from fuel build up in the exhaust system that may adverse-
ly affect the application.
Ignition Ballast Resistor / Loom Resistance Wire
The HYFIRE ® VIIC Ignition Ignition’s performance is not affected by the pres-
ence of the factory ignition resistors or ignition ballast resistors in the wire
from the ignition switch. It is not necessary to install ignition ballast resistors
as specified by the instructions for the particular distributor.
Ignition Coils
The HYFIRE ® VIIC Ignition Systems is designed to work with Mallory PRO-
MASTER ® Coil Part No. 28880. Avoid using any other type of ignition coil.
Spark Plug Wires
YOU MUST USE suppression type (carbon core, spiral core) spark plug wire.
We recommend spiral core ignition wire, such as Mallory PRO SIDEWINDER
®
Ignition Wire. Suppression type spark plug wires prevent false triggering and
the possibility of premature ignition or accessory failures.
DO NOT USE solid core (copper core; stainless steel core) spark plug wire
with any electronic ignition system or accessory. Solid core spark plug
wire is one cause of electro-magnetic interference (EMI; ignition noise).
EMI is one cause of false triggering (preignition; spark scatter) and pre-
mature ignition or accessory failures.
®
HYFIRE ® VII
C
PRO CD
IGNITION SYSTEM
Part No. 667C
4-12 Cylinder
6 Cylinder Odd-Fire
Notice: This product is legal to sell, distribute or install on vehicles in California. Executive Order D-70-6.
The HYFIRE ® VII Pro CD Ignition Controls are not compatible with distributorless systems or positive ground appli-
cations. The HYFIRE ® VII Ignition System is not designed for marine use.
Spark Plug Gaps
For street applications, use your engine manufacturer’s specifications. For
racing applications, start with your engine manufacturer’s specifications, then
experiment with and closely monitor various gaps to achieve maximum per-
formance.
Electric Welding
Disconnect the HYFIRE ® VII C Ignition System and unplug any distributor har-
nesses (if possible) before any welding is done on the vehicle.
External RPM Limiters
Mallory RPM Limiter Part Nos. 641-4, 641-6, 641-8, 642, 643 and 644 WILL
NOT function with the HYFIRE
® VII Ignition Systems.
Mallory PRO TACH ® I, IV and IV
The tachometer and shift light will work with the HYFIRE ® VII Ignition
Systems. However, the RPM limiter WILL NOT function with the HYFIRE ® VII
Ignition Systems. Turn the LIMIT RPM knob slightly past 11,000 to prevent
the RPM limiter from interfering with the tachometer’s other functions.
MOUNTING PROCEDURE
Step 1
Disconnect the battery (–) cable to cut power to the system.
Step 2
Select a convenient location to mount the HYFIRE ® VII Ignition System. Keep
the unit away from hot engine components or extreme heat such as the
exhaust system and manifolds. Keep the unit away from moving devices,
such as fans, belts and linkages. The location must be dry. Moisture will dam-
age components inside the unit.
Step 3
Mounting to a flat surface with shock mounts
• Hold the unit in its mounting position and center punch the mounting pat-
tern on the mounting surface for drilling mounting holes. Drill mounting
holes using a 9/32" drill bit.
• Install the shock mounts into the bottom plate of the unit. Hold the unit in
position where it will be mounted.
• From the backside of the mounting surface, insert the washers and the
1/4-20 nylock nuts onto the shock mount studs. Tighten each nut until
snug.
FORM 1460 (REV. C) 5/00
INSTALLATION INSTRUCTIONS
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